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Seed-bank dynamics of native and invasive Impatiens species during a five-year field experiment under various environmental conditions

by: Skálová, Hana; Moravcová, Lenka; Čuda, Jan; Pyšek, Petr

Publication date: 2019-9-26
Usage: Attribution 4.0 International
Topics: balsam, Impatiens glandulifera, Impatiens noli-tangere, Impatiens parviflora, plant invasions, seed dormancy, seed germination, soil environment
Publisher: Pensoft Publishers
Collection: biodiversity
Contributor: Pensoft Publishers
Language: English
Rights: https://biodiversitylibrary.org/permissions
Rights-holder: Copyright held by individual article author(s).
Volume: 50
Item Size: 22.2M

Abstract: Despite recent evidence on the important role of seed banks associated with plant invasions, and a large body of literature on invasive annual Impatiens species, little is known about the seed bank characteristics of Impatiens species. To bridge this gap, we conducted a five-year field experiment where we buried seeds of two invasive species (I. glandulifera and I. parviflora) and one native species (I. noli-tangere) across four localities in the Czech Republic, harbouring all three Impatiens species and differing in the environmental conditions. We found that the three Impatiens species differed in the characteristics of their seed banks. Both invasive species had a high seed germination rate of almost 100% in the first year after seed burial, while <50% of seeds of the native I. noli-tangere germinated during this year. In I. parviflora all seeds germinated in the first year after seed burial and later decomposed, i.e. the species had a transient seed bank. For I. glandulifera, the most invasive species, the survival of seeds differed among localities. At the first and second localities, the seeds decomposed in the first year after seed burial; in the third locality the seeds germinated in the second year; and in the fourth one, the seeds still germinated in the fourth year. The native I. noli-tangere formed a short-term persistent seed bank across all localities. Germinating or dormant seeds were found in the third year after burial in all localities, and in one locality the seeds persisted until the fifth year. The germination and dormancy in I. noli-tangere were constrained by low minimum temperatures during winter. In addition, germination was highest at intermediate soil moisture, and the most dormant seeds were recorded in soils with intermediate nitrogen concentration. The germination of I. glandulifera was slightly limited by low soil nitrogen. However, no such effect was found in I. parviflora. We suggest that in the invasive Impatiens species seed resistance to environmental factors and high germination at least partly explain their wide distribution.
Addeddate: 2025-04-02 14:54:16
Bhl_virtual_titleid: 210923
Bhl_virtual_volume: v.50 (2019)
Call number: 10_3897_neobiota_50_34827
Call-number: 10_3897_neobiota_50_34827
Foldoutcount: 0
Genre: article
Identifier: seedbankdynamic50skal
Identifier-ark: ark:/13960/s2q0qjsxq32
Identifier-bib: 10_3897_neobiota_50_34827
Identifier-doi: 10.3897/neobiota.50.34827
Ocr: tesseract 5.3.0-6-g76ae
Ocr_detected_lang: en
Ocr_detected_lang_conf: 1.0000
Ocr_detected_script: Latin
Ocr_detected_script_conf: 1.0000
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Page_number_confidence: 78
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Page_range: 75-95
Pages: 21
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Possible copyright status: In copyright. Digitized with the permission of the rights holder.
Ppi: 300
Source: NeoBiota 50
Year: 2019